Tosca' is an opera composed by Giacomo Puccini that debuted in Rome in 1900. It is based on the play of the same name by Victorien Sardou and is set in Rome in June 1800. The story follows the struggles of the singer Floria Tosca as she attempts to save her lover from the clutches of a corrupt police chief. The opera is known for its dramatic intensity and passionate arias, and it remains one of the most popular operas in the repertoire today.